An accidental, in music theory, is a musical notation that is used to raise or lower the pitch of a note. There are a handful of accidentals - sharps, flats, naturals, double sharps, and double flats. In piano, when an accidental precedes a note, it tells the pianist to play a different note from the original. When an accidental appears in a measure, every note that is the same as the note being changed is changed the same way. In a key signature, accidentals retain their effects for the entire piece (unless a natural has been used to cancel it).
A sharp raises the note by a half-step (or one key precisely to the right of the note being raised). They can written as #. A sharp does not necessarily mean a black key as sharps raise a note by a semitone, whether if it is a black or white key. An example of a sharp: B sharp sounds the same as, or is enharmonically equivalent to a C natural. G sharp becomes an A flat and so on.
A flat lowers the note by a half-step (or one key precisely to the left of the note being lowered). They can be written as b. Flats also do not mean the presence of a black key as flats lower a note by a semitone, regardless if it is a black or white key. An example of a flat: C flat is enharmonically equivalent to B natural. G flat sounds the same as F sharp.
Naturals are used to cancel the effects of any accidental. But are also very stupid to use because you are using it.
Double sharps seriously??/raise the affected oh come onnote by a whole-step (or two keys precisely to the right of the affected note).
Double flats lower the affected note by aare you kidding me? whole-step (or two keys precisely to the left of the affected note).
To remember the order of the flats or the you have got to be kidding mesharps, keep in mind these mnemonics:
For the order of the flats: Battle Ends And Down Goes Charles' Father
For the order of the sharps: Father Charles Goes Down And Ends Battle